least common denominator

During a 30 minute tv show, there are 8 minutes of commercials. During a 2 hour movie, there are 31 minutes of commercials. Write each commercial time as a fraction of the total time. which tv program has a greater fraction of commerical time.
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4 Answers

i have for questions i need to find the less common denominator for this problems but i dont know how to do that ??? it asks me to show my work

1.)  5/8 , 5/6            2.)   7/12,9/20            3.)  3/4,15/28                 4.)  5/6,20/27

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Find the least common denominator for the following group of denominators: x^2 + x - 6, x^2 + 3x, and x^2

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15/18 least common denimonator pleast
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1/2+3/4

 

give me the least common denominator

 

 

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